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New discoveries (No 3-prong plugs). 18mm wheel with 275/60/20 tire, perfect fit & driver+ jail

kizamybute'

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Got in another mini-trip of about 150 miles today. At my destination finally got to test out the onboard power outlets.


3-PRONG PLUGS
Tried to plug in anything with three prongs and the truck said NO. shut off power to the outlets each time, the second I plugged anything in. Including just a brand new extension cord with nothing on the other end. I bought one of those grounding plugs as I had read it was needed to attempt to charge an EV with one of the 110 outlets. Tried plugging that in and still no dice. Will call Rivian to find out what's up with that as that makes no sense. Would not accept any type of three prong plug. Finally, I cut off the third prong on one of the extension cords and it worked great. All other items I had with just two prongs worked fine too. Just absolutely nothing with three prongs. Which seems backwards as you'd think the truck would want the ground?

Anyone else with this issue?

TIRE / WHEEL FITMENT
See my other posts about the wheels and tires. Today's trip was a good test. Per that post, I originally installed custom 20x9 wheels with an 18mm offset and 285/60/20 mud-terrain tires. Given, they looked great (in my opinion), but are more squared off. No rubbing as they are 33 1/2 in diameter versus the stock all-terrain tires at 34". However, on a heavy dip, if the truck auto-switched to the low setting on the freeway, if I hit a heavy overpass dip, could just barely hear it just touch the fender flares. No visible evidence of it, but did hear it. Still not a bad setup.

But, per the post which was updated, I switched out the mud-terrain tires, primarily because they were notably louder than the stock tires. Knew I didn't want the stock size tires at 34", especially with the added offset. So, I purchased a Pirelli All-Terrain 275/60/20 (vs stock at 275/65/20). They have a 33" diameter. To me, in my opinion, I'm not a fan of the way the 34" tires dominate the wheel wells. They just seem oversized for the truck. Noting that the stock 21's and 22's come with tires that have a 33" diameter, and feeling that the way they filled the wheel wells was much more proportionate to the size of the truck, I chose the above noted tires. Exactly 1 inch smaller circumference. Same exact tread pattern and appearance as the stock tire. Driving both, can't tell ANY difference in noise. Basically, the same tire, however, they do not say they were built specifically for the Rivian as the stock size tires do. To me, seems like adding that designation is just a way for them to charge more for them as I can't otherwise tell one ounce of difference between them. The only difference I see is that Tire rack charges $394 for the stock tire and $248 for the same tire in a 275/60/20 size. Nearly $600 per set difference and in my line of business, I notice everything when it comes to feeling and hearing a vehicle. Anyway, tires with the 18mm offset wheels lines up perfectly with the fender flares. Truck went into low on the freeway, hit the exact same freeway over-pass dip at basically the same speed and no rubbing. Regardless of how you feel about the choice of wheels, for those seeking to add their own look to the truck with custom wheels and add just a little more "stance" to it, this is right at the edge, but seems to be a perfect fit. So, 18mm wheels appear to be the highest you can go without rubbing. Just one size up on tire, as noted above, was just a hair too much. Look at my other post to see photos of the fitment. Definitely 100% sticking with this size for wheels/tires.

DRIVER+ JAIL
Managed to find my way into Driver+ penalty Jail. Made no sense to me, but learned how the truck wants you to handle things. I always have my hand on the wheel, so never get any such warnings. Had a message pop-up that said "entering tunnel, take control". I already had my hands on the wheel, so didn't think much of it as I was already "in control". But, apparently when such a message appears, it wants you to take the extra step of actually disconnecting Driver+ (push up on shift lever or hit the brakes). With the Tesla, just steering was enough to satisfy any rare such issues. Not sure I ever saw such a warning, or anything like it, in my 8 years of Tesla's. Seems odd that I actually have to take a step to disengage it. Learned for the future, but since I didn't know and didn't do it, it tried to stop the truck on the freeway, typical if you ignore warnings for not having hands on the wheel in a Tesla and assuming, the Rivian too. Then, it wouldn't let me use it again "not available until next drive". Annoyed me with the Tesla and will annoy me just the same with the Rivian for some of the things it throws you in jail for. If you ignore the call to put your hands on the wheel, I completely get it. And, you deserve to be put in Driver+ jail for not paying attention. This one, I had control. It knew my hands were on the wheel. Too extreme of a penalty because I didn't take the extra step to disengage Driver+. Tesla, commonly had issues where I'd manually accelerate to complete a pass, so as not to hinder traffic behind me. If you press the throttle without first disengaging autopilot, and exceed the maximum limit at 80 mph, it's instant jail. Jail should only exist for the worst offenses.
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Dark-Fx

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Clubs
 
Haven't had issues with 3 prong plugs specifically, but the way they have ground configured seems like it could cause issues with some things. Some lighted extension cords potentially could fault out the inverter.
 

Laurent

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I purchased a Pirelli All-Terrain 275/60/20 (vs stock at 275/65/20). They have a 33" diameter. To me, in my opinion, I'm not a fan of the way the 34" tires dominate the wheel wells. They just seem oversized for the truck.
The R1T's in the Long Way Up were using 33" 275/60R20 Pirelli AT tires (see photo). Rivian went with 34" 275/65R20 tires after that. Maybe the change was based on data from that trip.

Rivian R1T R1S New discoveries (No 3-prong plugs). 18mm wheel with 275/60/20 tire, perfect fit & driver+ jail Long Way U
 
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kizamybute'

kizamybute'

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Haven't had issues with 3 prong plugs specifically, but the way they have ground configured seems like it could cause issues with some things. Some lighted extension cords potentially could fault out the inverter.
It is a lighted extension cord. I prefer those as it instantly tells me I have power to the cord. But, I also tried other 3 prong items that it immediately shut them off too. Tried to charge a radio battery. Doesn't make any sense. Hopefully Rivian has some type of answers. Silly to have to start cutting up extension cords just to get them
The R1T's in the Long Way Up were using 33" 275/60R20 Pirelli AT tires (see photo). Rivian went with 34" 275/65R20 tires after that. Maybe the change was based on data from that trip.

Long Way Up.jpg
For extreme off-roading, having a bigger sidewall is better. That's why we see Raptors with 17" wheels with 34-35 inch tires. So, for those that are doing extreme off-roading and are ones that commonly air down your tires to do so, then leaving the stock 34" tires is probably the better choice. For all else, I think the 33" set up is great. Again, in my opinion, they're more proportionately sized for this truck, will still handle most off-road situations. Technically, should make the truck a little quicker as it's like putting more gear to it, which will allow for even snappier acceleration off the line. So, depends on your particular use. For my use, which I may do some light off-roading, but not one that will ever air down tires and being that aesthetics are high on my list.

Add in, with my wheel package pushing the wheels out by 30mm, the tread width is now about 2 inches wider, which should also improve handling a bit.

So, there are certainly benefits. If those benefits appeal to you for a small sacrifice in extreme off-road capability, then they're a good choice. Saving $600 per set of tires isn't bad either.
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